Question

2. An electric heater draws a current of 10 A from a 220 V supply. What is the cost of
using the heater 5 hours per day for 30 days if the cost of 1 unit is 2.50? [Ans. 825)​

Answer 1

here,

required power(watt) = VI

= 220× 10= 2200 watt.

total time = 5× 30 days = 150 hrs

change in commercial unit (kWh)

= 2200watt/1000 × 150hrs

=330 kWh

(we know that 1kwh = 1unit)

so, total cost

=> 1kwh = 2.50rs

=> 330 kWh = 330× 2.50

=>rs 825 .

Answer 2

$\blue{\bold{\underline{\underline{\boxed{\star{\mathcal{\textit {Answer:825 }}}}}}}} \:$

Hey bro this is very easy question

$\pink{\bold{\underline{\underline{Step - by - step \: Explanation: }}}} \:$

$i \: = \frac{v}{r } \\ r = \frac{v}{i} \: \: \: r = \frac{220}{10} = 22ohm$

$\blue{\bold{\underline{\underline{\star{\mathcal{\textit {condition : }}}}}}}$

$heater \: use \: 5 \: hours \: per \: day \\ for \: 30 \: days.cost \: of \: 1 \: unit \: is \\ 2.50.$

$therefore \: 5 \times 30 = 150 \: \\ \frac{150}{10} = 15 hours \\ total \: cost \: os \: using \: heater \: for \: 30 \: days = \\ 22 \times 15 \times 2.50 = 825 \: rupees$

$\pink{\bold{\underline{\underline{i \: hope \: this \: will \: help \: you \: then \: pls \: follow \: me }}}}$

$\pink{\bold{\underline{\underline{and \: mark \: it \: as \: brainliest. }}}}$